Hydrotech's TFC (thin film composite) residential reverse osmosis membrane

Models F-HT-75, F-HTF-75, 1240 Series, 1240 E Series, 1240 M Series, 1240 Pro Series, 4VTFC75G, 4VTFC75GPB, 4VTFC75G-PB, and others are compatible with Hydrotech, Duro, and Novatek RO systems.

This is a genuine Hydrotech membrane produced by Dow in North America.

A blue banded membrane that is yellow.